Hoist



Jam, 3l, 1950 w. w. BERCHTOLD 2,495,804

I HOIST Filed March 5l, 1944 2 Sheets-Sheet 1 YT o . W Q6 .H /r

@me l INVENTOR h/z 465 h/f/frm wml ATTORNEY Jan., 3l, i950 W. W.BERCHTOLD HOIST 2 Sheets-Sheet 2 Filed March 51, 1944 lNvENToR Mana-f/f/fmmm Patented Jan. 3l, -1950 HOIST Wallace W. Berchtold, York, Pa.,assignor to American Chain & C

able Company, Inc.,

Bridgeport, Conn., a corporation of New York Application March 31, 1944,Serial No. 529,017

4 Claims.

This invention relates to improvements in hoists, cranes and liftingdevices generally.

The objects of this invention are improvements in hoists, moreparticularly portable hoists including improvements which are alsoapplicable to stationary hoists, travelling hoists, cranes and lifts.

More particularly, an object of this invention is an improved portablehoist provided with a hollow extension tube provided with a cable guideand supporting a cable pulley at a suitable distance from the hoist headhousing the cable operating mechanism in order that objects may beraised in restricted spaces, and for the purpose of supporting the endof the extension tube the end of the extension tube or cable pulleyhousing may be provided with anchoring means adapted for connection toany suitable overhead support above said space.

As the space in which the hoisting is performed is restricted and inview of which the cable eye or hook must be of small size andconsequently of insufficient weight to unreel the cable from the drum,and as the extension tube may be of such length as to place the cableeye or hook beyond the reach of the operator, it is an object of thisinvention also to provide means fol1 unreeling the cable by rotating thecable drum, means be'ing provided for facilitating such unreelingcomprising a roller for pressing the cable against the drum and cableguiding means having one of its ends adjacent said drum and movabletransversely of the face of the drum to follow the cable duringunreeling.

It is also an object of this invention to provide means for locating acable pulley and drum in the same or different planes, facilitating theuse of the hoist under conditions where the object to be moved is to bemoved laterally or in a direction at an angle to the vertical, or wherefor convenience of operation it is desirable to hold the hoist head inother than a vertical plane.

A further object of this invention is to provide means for supportingthe hoist head on the operator or for supporting it by the hand of theoperator, a plurality of crank means, one on each side of the hoisthead, and a clutching means providing for unreeling of the cable bypulling on the end of the cable or by means of the weight of the cableeye or hook or a special load placed thereon where hoisting spacepermits.

Other objects of this invention will appear from the followingdescription taken in connection with the drawings, in which:

Fig. 1 is a right side elevational view of a 55 portable hoist embodyingimprovements in accordance with this invention;

Fig. 2 is an end View looking toward the left in Fig. l;

Fig. 3 is a sectional detail view on the line 3 3 of Fig. 1;

Fig. 4 is a sectional detail view on the line 4 4 of Fig. 1;

Fig. 5 is a vertical section through the hoist head on the line 5 5 ofFig. 1;

Fig. 6 is a horizontal section on the line 6 6 of Fig. 5;

Fig. '7 is a vertical section on the line 1 1 of Fig. 5; and

Fig. 8 is a detail of a shiftable ring gear, the inner face of the cabledrum and the driving pinion for the ring gear.

The improvements in accordance with this invention have been shown inconnection with a portable hoist but obviously certain of theimprovements are applicable to stationary hoists, travelling hoists,lifts and cranes.

As disclosed in Figs. l, 2 and 5, the hoist head or casing A is acomposite construction including the main housing member I0 open on itsright hand side and closed by a disk-like member II to the outer side ofwhich is connected the third housing member I2.

The cable drum I4 on which the cable I5 is wound is supported on a mainoperating shaft I6 journaled in the casing members I0 and I I and to theleft hand end of which is connected an operating crank I1 which isnon-rotatably 'mounted on the shaft I6 and which may be used as abooster crank or unreeling crank or as a means for controlling the speedof unreeling of the cable from the drum by the weight of an objectsupported on the end of the cable.

Operatively associated with the right hand end of the shaft I6 is acrank I8 which is provided with a hub mounted for rotational movement onthe shaft IG which is limited by the engagement of a lug carried therebywith shoulders on a member I9 (Fig. 1) secured on the shaft I6. Both ofthe cranks I1 and I8 may be made extensible Aas shown. The hub of thecrank I8 also includes a brake and driving disk 20 and is providedinteriorly with a low pitch square thread not disclosed but old and wellknown, which meshes with an exterior square thread on the shaft I6 andsecured to the shaft at the inner end of the thread is a brake ordriving disk 2|. Interposed between the disks 20 and 2I is an annularratchet 22 which is provided with friction facings and which when thecrank is movedv forward will be clamped between the disks 20 and 2| andconstitute the driving connection between these disks, that is, thedriving connection between the crank I8 and shaft I6. Cooperating withthe ratchet 22 is a ratchet pawl 23 to prevent retrograde movement orrotation of the ratchet and of the shaft I6 to hold the object lifted inits raised position. When it is desired to lower the object the crank I8will be moved in the opposite direction to release the braking orclutching pressure between the disks 2D and 2I on the ratchet 22 topermit a raised object to be lowered. The speed at which the object islowered may be controlled by controlling the amount of friction betweenthe ratchet and the disks 20 and 2l and also by means of the crank I1.The constructions including parts I8, I9, 20, 2| and 22 are old and wellknown.

Connected to the shaft I6 is a pinion 25 (Figs. and 6) which meshes withgears 26 provided with hubs 21 rotatable on rods 28 supported at one endin holes 29 in the member II and at the other end in holes in an annularmember 30 which is supported on the inner wall of the casing member IIby means of horizontal members 3| cast integral with the members II and3IJ. These members 3I will be referred to later.

Formed in the hubs 21 are pinions 35 the teeth oi which are in mesh withthe teeth on the inner face of a ring gear 36, the outer face of whichis provided with splines 38 in mesh with splines 39 on the inner face ofthe cable drum I4 constituting a driving connection between the ringgear and the drum.

For the purpose of providing free unreeling of the cable the ring gear36 is mounted for sliding movement to disengage the splines 38 of thering gear from the splines 39 ci the cable drum, but the movement of thering gear is not sucient to disengage its interior gear teeth from theteeth of the pinions 35. For the purpose of eiecting this shiftingmovement of the ring 'gear there are provided slides 4U (Figs. 5, 6 and'1) which slide in guideways in the members 3I and which are providedwith projections 4I operating in slots 42 in the guideways and which areoperated by rods 43 connected to crank arms 44 on a shaft 45 journaledin the casing member I2 and provided with a maniplating means 46, asdisclosed in Fig. 1.

The hoist head or housing A is provided with a split tubular shortprojection 50, as disclosed in Fig. 1, in whichl is secured an extensiontube 5I by clamping means 52 of a well known form and shown in detail inFig. 4. As shown in Fig. 1, this clamping means is provided to hold therotational adjustment of the extension tube 5I with respect to thehousing A.

Supported upon the outer end of the extension tube 5I is a cable pulleyhousing 55 in which is supported a cable pulley 55 over which the cablepasses. The pulley housing may be provided with links 51 connected by across bolt 58 for connection with a hook 59 or the like which may besecured to a support above the space in which the hoisting operation isto be performed.

The end of vthe cable is provided with an attaching eye 6G which isshown as of small size and of a weight insufficient to unreel the cablefrom the drum. As the eye is of such small weight, means is provided forunreeling the cable from the drum by driving the drum from the cranks I1and I8. For this purpose there is provided a pressure roller 60' (Figs.l and 5) which extends the full width of the drum and which bears on thecable, pressing the cable against the drum and causing the cable to bepushed toward the right when the operating cranks are moved in reversedirection to unreel the cable. This pressure roller is pressed onto thecable by any suitable means such as springs 6I which surround adjustingbolts 62 which have their heads bearing against the outer face of thehoist head casing element I0 and have threaded portions threaded intothe ends of a rod 65 on which the pressure roller is rotatably mounted.This pressure roller is preferably made of a composition or syntheticmaterial and acts as a brake and does not allow the drum to run wildcausing the snagging of the cable when the mechanism is conditioned forfree unreeling and the cable is unreeled by pulling on the end of thecable.

In order to support and guide the section of the cable between the drumI4 and the cable pulley 56 when the cable is unreeled by rotating thedrum by means of the cranks, a cable guide 1li in the form of a tube isprovided. The forward end oi the cable guide 16 is connected by a loosepivotal connection 'Ii in the cable pulley housing 55 so that the lefthand end of the cable guide may move in anyl direction with respect tothe pulley.

As disclosed in Fig. l, the hoist head or housing A and the pulleyhousing 55 are shown in the same vertical plane so that the left handend of the cable guide 1G, as the cable is unreeled, follows themovement of the cable, that is, it moves horizontally, and toaccommodate this movement and also to support the left hand end of thecable guide, the short extension is provided with a transverselyextending wall 13 which is provided with a horizontally extending slot14 constituting a guide and a bearing for the left hand end of the cableguide.

The hoist head housing or casing A may be provided with a hand hold 8Dfor convenience in supporting the hoist by either hand of the operatorwhen operating the hoist by one hand. In the case where it is desired touse both hands in lifting objects or in lowering objects or in unreelingthe cable, the hoist head may be supported on the body ci' the operatorby a strap 8l which may be connected to a ring 82 supported on the handhold 8i).

While the invention has been described with particularity as to theembodiment disclosed, it is to be understood that changes may be madewithin the principles of this invention and within the scope of theappended claims.

I claim:

l. In a hoist mechanism, a housing, a cable drum journaled in saidhousing, means for rotating said drum, an opening in said housingthrough which a cable wound on said drum passes and operates. a rollermounted in said housing and pressing a cable against said drum on a lineadjacent to and to the rear of the point where the cable leaves saiddrum, a hollow extension on said housing through which said cableoperates, a cable pulley on the outer end of said extension over whichsaid cable passes, a cable guide extending from a point adjacent to saidroller to a point adjacent to said pulley within said extension, andmeans supporting said cable guide therein.

2. In a hoist mechanism, a housing, a cable drum journaled in saidhousing, means for rotating said drum, an opening in said housingthrough which a cable wound on said drum passes and operates, a rollermounted in said housing and pressing a cable against said drum on a lineadjacent to and to the rear of the point Where the cable leaves saiddrum, a hollow extension on said housing through which said cableoperates, a cable pulley on the outer end of said extension over whichsaid cable passes, a cable guide extending from a point adjacent to saidroller to a point adjacent to said pulley Within said extension, andmeans supporting said cable guide therein and means on the outer end ofsaid extension for attachment to an overhead support.

3. In a hoist mechanism, a housing, a cable drum journaled in saidhousing, means for rotating said drum, an opening in said housingthrough which a cable on said drum passes and operates, a roller mountedin said housing and vpressing against the outer face of a cable on saiddrum along a line adjacent to and to the rear of the point where thecable leaves said drum, an extension tube on said housing through whichsaid cable operates, a cable pulley on the outer end of said extensionover which said cable passes, a cable guide Within said extension tube,means pivotally supporting the outer end of said cable guide at a pointadjacent to said pulley for universal movement and means on said housingsupporting the inner end of said cable guide for transverse movement ofsaid inner end of said cable guide with the movement of the cable as itis being reeled and unreeled from said drum.

4. In a hoist mechanism, a housing, a cable drum journaled in saidhousing, means for rotating said drum, an opening in said housingthrough which a cable on said drum passes and operates, an extensiontube on said housing through which said cable operates, a cable pulleyon the outer end of said extension over which said cable passes, a cableguide within said eX- tension tube, means pivotally supporting the outerend of said cable guide at a point adjacent to said pulley for universalmovement and means on said housing supporting the inner end of saidcable guide for transverse movement of said inner end of said cableguide with the movement of the cable as it is being reeled and unreeledfrom said drum.

WALLACE W. BERCHTOLD.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 402,688 Schulz May 7, 18891,060,103 Leichy Apr. 29, 1913 1,234,475 Hilding July 24, 1917 1,433,289McKenna Oct. 24, 1922 1,760,514 Morgan May 27, 1930 2,221,903 Abramsonet al Nov. 19, 1940I 2,256,982 Lawler Sept. 23, 1941 2,262,937 HolmesNov. 18, 1941 2,284,120 Booker May 26, 1942 2,284,532 Napier May 27,1942 2,391,172 Leland Dec. 18, 1945

